fix: fisheye fragment shader
fix: fisheye fragment shader

Fisheye fragment shader now compiles and images are drawn in the HTML
reconstrunction viewer. Although they look wrong!

oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM